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HS 4 Test Construction
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Naïeve strategieën voor oplossen item non-response
Naïeve strategieën voor oplossen item non-response
1. Uitsluiting respondenten die één of meer items niet hebben beantwoorden EN uitsluiting items die niet zijn beantwoord door vele respondenten - zorgt wel voor suboptimaal gebruik en mogelijke selection bias (alleen indien aantal verwijderde items of respondenten laag is).
2. Personal Mean (PM) gebruiken voor missende item respons. Fungeert als imputed item score. Nadeel: variantie van test scores wordt beïnvloed (allen indien aantal missende items responsen laag is).
2 Categorieën oplossen item non-respons bij typische prestatie test
2 Categorieën oplossen item non-respons bij typische prestatie test
1. Algemene statistische methoden voor missende data.
2. Specifieke psychometrische methodes voor testen (VB: Two-way with Error - TW-E imputation method).
PMCj
PMCj
Persoonlijk gemiddelde (Personal Mean) van de testpersoon j op de subtest van de Contra-indicatieve items = de som van de itemscores van de testpersoon j op de contra-indicatieve items gedeeld door het totale aantal contra-indicatieve items
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